Add custom wildcard matcher.

src/autotype/WildcardMatcher.cpp

@@ -0,0 +1,96 @@
+/*
+ *  Copyright (C) 2012 Felix Geyer <debfx@fobos.de>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 2 or (at your option)
+ *  version 3 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "WildcardMatcher.h"
+
+#include <QtCore/QStringList>
+
+const QString WildcardMatcher::Wildcard = "*";
+
+WildcardMatcher::WildcardMatcher(QString text, QObject* parent) :
+    QObject(parent)
+{
+    m_text = text;
+}
+
+bool WildcardMatcher::match(QString pattern)
+{
+    m_pattern = pattern;
+
+    if (patternContainsWildcard()) {
+        return matchWithWildcards();
+    }
+    else {
+        return patternEqualsText();
+    }
+}
+
+bool WildcardMatcher::patternContainsWildcard()
+{
+    return m_pattern.contains(Wildcard);
+}
+
+bool WildcardMatcher::patternEqualsText()
+{
+    return m_text.compare(m_pattern) == 0;
+}
+
+bool WildcardMatcher::matchWithWildcards()
+{
+    QStringList parts = m_pattern.split(Wildcard, QString::KeepEmptyParts);
+    Q_ASSERT(parts.size() >= 2);
+
+    if (startOrEndDoesNotMatch(parts)) {
+        return false;
+    }
+
+    return partsMatch(parts);
+}
+
+bool WildcardMatcher::startOrEndDoesNotMatch(QStringList parts)
+{
+    return !m_text.startsWith(parts.first()) || !m_text.endsWith(parts.last());
+}
+
+bool WildcardMatcher::partsMatch(QStringList parts)
+{
+    int index = 0;
+    Q_FOREACH (QString part, parts) {
+        int matchIndex = getMatchIndex(part, index);
+        if (noMatchFound(matchIndex)) {
+            return false;
+        }
+        index = calculateNewIndex(matchIndex, part.length());
+    }
+
+    return true;
+}
+
+int WildcardMatcher::getMatchIndex(QString part, int startIndex)
+{
+    return m_text.indexOf(part, startIndex);
+}
+
+bool WildcardMatcher::noMatchFound(int index)
+{
+    return index < 0;
+}
+
+int WildcardMatcher::calculateNewIndex(int matchIndex, int partLength)
+{
+    return matchIndex + partLength;
+}